Imperial College London
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ProfessorRogerWhatmore

Faculty of Engineering, Department of Materials

Visiting Professor
 
 
 
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Contact

 

r.whatmore

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

343 results found

Sweeney TG, Whatmore RW, 1996, ELECTROPHORETIC DEPOSITION OF FERROELECTRIC THIN FILMS, FERROELECTRICS, Vol: 187, Pages: 57-73, ISSN: 0015-0193

Journal article

Sweeney T, Whatmore RW, 1996, Electrophoretic deposition of PZT ceramic films, 10th IEEE International Symposium on Applications of Ferroelectrics (ISAF 96), Publisher: I E E E, Pages: 193-196

Conference paper

Impey SA, Huang Z, Patel A, Watton R, Whatmore RWet al., 1996, Structural characterisation of sol-gel PZT thin films, 10th IEEE International Symposium on Applications of Ferroelectrics (ISAF 96), Publisher: I E E E, Pages: 439-442

Conference paper

Galloway N, Whatmore RW, 1996, Untitled, FERROELECTRICS, Vol: 187, Pages: V-VI, ISSN: 0015-0193

Journal article

WHATMORE RW, CORBETT J, 1995, NANOTECHNOLOGY IN THE MARKETPLACE, COMPUTING & CONTROL ENGINEERING JOURNAL, Vol: 6, Pages: 106-107, ISSN: 0956-3385

Journal article

PATEL A, OSBOND PC, SHORROCKS NM, TWINEY RC, WHATMORE R, WATTON Ret al., 1994, Ferroelectric ceramics and thin films for uncooled thermal imaging arrays, 9th IEEE International Symposium on Applications of Ferroelectrics (ISAF 94), Publisher: I E E E, Pages: 647-652

Conference paper

OSBOND PC, WHATMORE RW, 1993, HIGH DIELECTRIC-CONSTANT CERAMICS IN THE PBSC0.5TA0.5O3-PBZRO3 AND PBSC0.5TA0.5O3-PBTIO3 SYSTEMS, JOURNAL OF MATERIALS SCIENCE, Vol: 28, Pages: 1377-1384, ISSN: 0022-2461

Journal article

Tossell DA, Shorrocks NA, Whatmore RW, 1993, Ferroelectric ceramics and thin films for pyroelectric applications, Integrated Ferroelectrics, Vol: 3, Pages: 301-308, ISSN: 1058-4587

The extensive work carried out at Caswell in recent years on ferroelectric ceramics for pyroelectric applications is reviewed briefly. With the ultimate aim of fully CMOS compatible integrated thermal detectors and imagers, pure and lanthanum doped lead titanate thin films have been deposited using the emerging PVD technique of dual ion beam sputtering (DIBS). The DIBS process produces high quality orientated perovskite films. Films have been formed at 500-600°C onto sapphire. MgO and silicon substrates by sputtering from an adjustable composite PLZT ceramic/Ti and Pb metallic target. Some substrates were coated with platinum/titanium prior to deposition to allow longitudinal electrical measurements to be made on the films. On silicon, the platinum/titanium electrodes were found to blister during the PLZT thin film deposition process. Pure and 7% lanthanum doped lead titanate films have shown pyroelectric effects with coefficients in the range 0.5-4.0 x 10-4 Cm2 K 1 and a figure of merit of 2.6 x 10-5 Pa These results are encouraging with respect to the goal of integrated pyroelectric IR detector arrays on silicon. Further improvements should be possible since the process and substrate/electrode preparation have not yet been fully optimised. © 1993, Taylor & Francis Group, LLC. All rights reserved.

Journal article

WHATMORE RW, STRINGFELLOW SB, SHORROCKS NM, 1993, FERROELECTRIC MATERIALS FOR UNCOOLED THERMAL IMAGING, 19TH INFRARED TECHNOLOGY CONF, Publisher: SPIE - INT SOC OPTICAL ENGINEERING, Pages: 391-402

Conference paper

Herbert JM, Whatmore RW, 1992, Guest editorial, Ferroelectrics, Vol: 134, Pages: xxiii-xxiv, ISSN: 0015-0193

Journal article

Herbert JM, Whatmore RW, 1992, Guest editorial, Ferroelectrics, Vol: 133, Pages: xxiii-xxiv, ISSN: 0015-0193

Journal article

Ainger F, Patel A, Shorrocks NM, Trundle C, Whatmore RWet al., 1992, Thin ferroelectric films for thermal detector applications, Integrated Ferroelectrics, Vol: 1, Pages: 363-378, ISSN: 1058-4587

The deposition of thin films of lead scandium tantalate (Pb(Sc1/2Ta1/2)O3 have been investigated by two processing routes, in the first, progress is reviewed for chemical vapour deposition in a purpose built low pressure reactor, utilising suitable modified proprietary precursors. Deposition has been studied over the temperature range 400–800°C and, in general, amorphous films result which convert to crystalline perovskites on subsequent annealing. However, inclusion of hydroxy compounds in the vapour train catalyses the crystallisation process and enhances the growth rate at above 600C. It was found that the best thin films, in terms of density and morphology, are formed at low deposition rates 1–2μm/hr. The perovskite phase is obtained if the gas phase composition is controlled throughout growth. The choice of precursors, gas compositions and growth conditions will be described. In the second process, lead scandium tantalate thin films (>1μm) were deposited using a modified sol-gel solution route. This was achieved by spin-coating a solution of metallo-organic compounds of scandium and tantalum followed by lead, onto suitable substrates and firing and annealing the films at 800–1000C. These firing temperatures gave films with grain sizes ranging from 0.5–4μm, which are single phase perovskite. Permittivity, dielectric loss and field induced pyroelectricity have been measured against field and temperature to assess the pyroelectric figure-of-merit, Fn of films obtained from both film deposition process. The FD for sol-derived films indicates a performance similar to that of bulk ceramic material. © 1992, Taylor & Francis Group, LLC. All rights reserved.

Journal article

TOSSELL DA, OBHI JS, SHORROCKS NM, PATEL A, WHATMORE RWet al., 1992, PYROELECTRIC AND ELECTROOPTIC PROPERTIES OF SOL-GEL AND DUAL-ION BEAM SPUTTERED PLZT THIN-FILMS, 8TH IEEE INTERNATIONAL SYMP ON APPLICATIONS OF FERROELECTRICS ( ISAF 92 ), Publisher: I E E E, Pages: 11-18

Conference paper

WHATMORE RW, SHORROCKS NM, OSBOND PC, STRINGFELLOW SB, CARTER CF, WATTON Ret al., 1992, MODIFIED LEAD SCANDIUM TANTALATE FOR UNCOOLED LWIR DETECTION AND THERMAL IMAGING, 8TH IEEE INTERNATIONAL SYMP ON APPLICATIONS OF FERROELECTRICS ( ISAF 92 ), Publisher: I E E E, Pages: 202-205

Conference paper

WHATMORE RW, EDWARDS IM, TWINEY RC, STRINGFELLOW SB, PORTER SG, MANNING P, WATTON Ret al., 1992, UNCOOLED IR THERMAL DETECTOR ARRAYS, 1992 MILITARY MICROWAVE CONF ( MM 92 ), Publisher: MICROWAVE EXHIBITIONS & PUBL LTD, Pages: 193-198

Conference paper

TOSSELL DA, SHORROCKS NM, OBHI JS, WHATMORE RWet al., 1992, GROWTH OF PEROVSKITE PLZT THIN-FILMS BY DUAL ION-BEAM SPUTTERING, 2ND EUROPEAN CONF ON THE APPLICATION OF POLAR DIELECTRICS / 1ST INTERNATIONAL WORKSHOP ON INTEGRATED FERROELECTRICS, Publisher: GORDON BREACH SCI PUBL LTD, Pages: 297-302, ISSN: 0015-0193

Conference paper

SALLOWAY AJ, TWINEY RC, WHATMORE RW, LANE Ret al., 1992, THE ACTIVE CONTROL OF SOUND REFLECTION-TRANSMISSION COEFFICIENTS USING PIEZOELECTRIC COMPOSITE-MATERIALS, 2ND EUROPEAN CONF ON THE APPLICATION OF POLAR DIELECTRICS / 1ST INTERNATIONAL WORKSHOP ON INTEGRATED FERROELECTRICS, Publisher: GORDON BREACH SCI PUBL LTD, Pages: 89-91, ISSN: 0015-0193

Conference paper

HERBERT JM, WHATMORE RW, 1992, PROCEEDINGS OF THE 2ND EUROPEAN CONFERENCE ON THE APPLICATION OF POLAR DIELECTRICS, FERROELECTRICS, Vol: 134, Pages: R23-R24, ISSN: 0015-0193

Journal article

PATEL A, TOSSELL DA, SHORROCKS NM, WHATMORE RW, WATTON Ret al., 1992, PYROELECTRIC PROPERTIES OF LEAD-BASED FERROELECTRIC THIN-FILMS, Symposium on Ferroelectric Thin Films III, at the 1991 Fall Meeting of the Materials-Research-Society, Publisher: MATERIALS RESEARCH SOC, Pages: 53-58, ISSN: 0272-9172

Conference paper

SHORROCKS N, PATEL A, WHATMORE R, 1992, PYROELECTRIC PROPERTIES OF THIN-FILM LEAD SCANDIUM TANTALATE, FERROELECTRICS, Vol: 133, Pages: 35-40, ISSN: 0015-0193

Journal article

CHILTON J, GARNER G, TWINEY R, WHATMORE Ret al., 1992, HIGH MOISTURE RESISTANT ELECTROACTIVE COMPOSITES, FERROELECTRICS, Vol: 127, Pages: 197-202, ISSN: 0015-0193

Journal article

OSBOND PC, WHATMORE RW, 1992, HIGH DIELECTRIC-CONSTANT CERAMICS IN THE PBSC0.5TA0.5O3-PBZRO3 SYSTEM, Publisher: TAYLOR & FRANCIS LTD, Pages: 159-161, ISSN: 0015-0193

Conference paper

HERBERT JM, WHATMORE RW, 1992, PROCEEDINGS OF THE 2ND EUROPEAN CONFERENCE ON THE APPLICATION OF POLAR DIELECTRICS TO CELEBRATE THE 25TH ANNIVERSARY OF THE DIELECTRIC-SOCIETY INCORPORATING 1ST INTERNATIONAL WORKSHOP ON INTEGRATED FERROELECTRICS - 12-15 APRIL 1992, LONDON, UNITED-KINGDOM - GUESTA EDITORIAL .1., FERROELECTRICS, Vol: 133, Pages: R23-R24, ISSN: 0015-0193

Journal article

PATEL A, LOGAN EA, NICKLIN R, HASDELL NB, WHATMORE RW, UREN Met al., 1992, FERROELECTRIC THIN-FILMS INTENDED FOR ELECTRONIC DEVICE APPLICATIONS, Symposium on Ferroelectric Thin Films III, at the 1991 Fall Meeting of the Materials-Research-Society, Publisher: MATERIALS RESEARCH SOC, Pages: 447-452, ISSN: 0272-9172

Conference paper

PATEL A, SHORROCKS N, WHATMORE R, 1992, PHYSICOCHEMICAL PROPERTIES OF SOL-GEL DERIVED LEAD SCANDIUM TANTALATE PB(SC0.5TA0.5)03 THIN-FILMS, FERROELECTRICS, Vol: 134, Pages: 343-348, ISSN: 0015-0193

Journal article

PATEL A, SHORROCKS NM, WHATMORE RW, 1991, PREPARATION AND PROPERTIES OF PBTIO3 AND PB(SC0.5TA0.5)O3 THIN-FILMS BY SOL-GEL PROCESSING, IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, Vol: 38, Pages: 672-676, ISSN: 0885-3010

Journal article

WHATMORE RW, 1991, PYROELECTRIC CERAMICS AND DEVICES FOR THERMAL INFRARED DETECTION AND IMAGING, FERROELECTRICS, Vol: 118, Pages: 241-259, ISSN: 0015-0193

Journal article

OSBOND PC, WHATMORE RW, 1991, IMPROVEMENTS TO PYROELECTRIC CERAMICS VIA STRONTIUM DOPING OF THE LEAD ZIRCONATE-LEAD IRON NIOBATE-LEAD TITANATE SYSTEM, FERROELECTRICS, Vol: 118, Pages: 93-101, ISSN: 0015-0193

Journal article

CHILTON JA, GARNER GM, TWINEY RC, WHATMORE RW, AINGER FWet al., 1991, PROPERTIES OF 0-3 COMPOSITES, 7TH INTERNATIONAL SYMP ON APPLICATIONS OF FERROELECTRICS, Publisher: I E E E, Pages: 86-89

Conference paper

AINGER FW, BASS K, BRIERLEY CJ, HUDSON MD, TRUNDLE C, WHATMORE RWet al., 1991, DEPOSITION OF FERROELECTRIC OXIDES BY MOCVD, PROGRESS IN CRYSTAL GROWTH AND CHARACTERIZATION OF MATERIALS, Vol: 22, Pages: 183-197, ISSN: 0146-3535

Journal article

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